mabujo

Featured Image Sharpen Up makes a tiny version of your featured post image and places it in the head of the page. 
As you scroll down the page, some JavaScript lazy loads the featured images in the background and replaces the tiny images as the full images are loaded.
You may have seen a similar effect used for images on medium.com.
Created on WordPress 4.4, but should work on earlier versions. 
Tested working on all Twenty Sixteen, Twenty Fifteen, Twenty Fourteen, Twenty Thirteen, Twenty Twelve and Twenty Eleven themes. Should work on other themes, but may need CSS adjustments, depending on theme handling of featured images.
Uses jQuery.Lazy(); (http://jquery.eisbehr.de/lazy/) and Hugh Lashbrooke’s plugin template (https://github.com/hlashbrooke/WordPress-Plugin-Template)
Plugin page : <a href="https://mabujo.com/blog/featured-image-sharpen-up-wordpress-plugin/" rel="nofollow ugc">Featured Image Sharpen Up plugin @ mabujo</a>

Featured Image Sharpen Up

This plugin helps increase the page loading speed of your site by replacing featured post images with a small inline image, and lazy loading the full  …

Mustafa Uysal

wphandle

poweredcache

skopco

Powered Cache is your comprehensive solution for enhancing WordPress site performance, ensuring a swift and seamless user experience.
The Free version provides essential tools to boost your site’s speed while the <a href="https://poweredcache.com" rel="nofollow ugc">Premium version</a> unlocks a suite of advanced optimization features.
<h4>Features ⚡️</h4>
Simple and easily configurable: Import and export settings effortlessly.
Page Caching: Accelerate page loads, trusted by top-tier websites.
Object Caching: Speed up dynamic pageviews. It supports Redis, Memcached, Memcache, and APCu.
Page Cache Rule Management: Need advanced caching configurations? Got it covered under advanced options. <a href="https://docs.poweredcache.com/advanced-options/" rel="nofollow ugc">Details</a>
File Optimization: Easily minify and combine CSS, JS files. Eliminate render-blocking resource problems easily. <a href="https://docs.poweredcache.com/category/file-optimization/" rel="nofollow ugc">And more</a>
Database Optimization: Keep redundant data away from your database.
Media Optimization: Enable Lazy Load, replace YouTube videos with thumbnails, control WordPress embeds, remove emoji scripts.
Combine Google Fonts: Combine Google Fonts URLs into a single URL and optimize the font loading.
Rewrite Support: Automatic .htaccess configuration for the ideal setup. The cached file can be served without executing PHP at all.
Mobile Support: Separate cache file for mobile, in case want to use the separate theme for the mobile.
Logged-in User Cache: If you have user-specific content or running a membership site, it creates cached results for the logged-in users.
CDN Integration: Integrate your website with CDN; you just need to enter CNAME(s) and corresponding zones.
Cache Preloading: Creating cached pages in advance. This feature will keep caching layer warm.
Prefetched DNS: Resolve domain names before resources get requested. Reduce DNS lookup time.
Gzip Support: Compress caching files with gzip.
Built-in Extensions: Cloudflare, Heartbeat
Multisite Support: You can activate network-wide or site basis. It’s compatible with domain mapping.
Smart Cache Purging: Only purge the cache that is affected by the content changes.
Compatible: Tested and compatible with popular plugins.
Battle Tested: Trusted by enterprise-grade websites.
<h4>Built-in Extensions</h4>
Built-in extensions (aka add-ons) shipped with Powered Cache to provide more functionality.
Cloudflare: Cloudflare compatibility and functionalities Free 
Heartbeat: Manage the frequency of the WordPress Heartbeat API. Free 
Varnish: Varnish cache purging Premium only 
Google Tracking: Powered Cache will host Google scripts on your server to help satisfy the PageSpeed recommendation. Premium only 
Facebook Tracking: Powered Cache will host Facebook scripts on your server to help satisfy the PageSpeed recommendation. Premium only
<h4>Premium Features</h4>
Explore the powerful capabilities offered by Powered Cache Premium:
<ul>
<li>Critical CSS & Load CSS Asynchronously: Accelerate your page load times by prioritizing essential styles.</li>
<li>Remove Unused CSS: Smartly scans your website to identify and eliminate unused CSS rules, optimizing performance.</li>
<li>Automatic Image Dimension Assignment: Adds missing dimensions to images to improve layout stability and speed.</li>
<li>Link Prefetching: Pre-fetches links to provide a smoother user experience.</li>
<li>Image Optimizer: On the fly image compression, including AVIF/WebP format conversion, to enhance load speed.</li>
<li>Sitemap Preloading: Automatically visits URLs listed in your sitemap to pre-generate cache, ensuring faster load times for your visitors.</li>
<li>Scheduled Database Cleanups: Automates database optimization tasks to maintain peak performance.</li>
<li>Varnish Extension: Enhance your site’s caching capabilities with Varnish support.</li>
<li>Google & Facebook Tracking Extensions: Host external tracking scripts locally, with automatic updates when the external resource changes.</li>
<li>WP-CLI Support: Command-line options available to streamline your workflow.</li>
<li>Top-Notch Premium Support: Get high-quality support for any issues you might encounter.</li>
<li>Ad-Free Plugin Interface: Enjoy an uncluttered, ad-free plugin admin page.</li>
</ul>
By upgrading to Powered Cache Premium you also get access to one-on-one help from our knowledgeable support team and our extensive documentation site.
<a href="https://poweredcache.com/" rel="nofollow ugc">Learn more about Powered Cache Premium</a>
<h4>Contributing & Bug Report</h4>
Bug reports and pull requests are welcome on <a href="https://github.com/poweredcache/powered-cache" rel="nofollow ugc">Github</a>. Some of our features are premium only, please consider before sending PR.
<h4>Documentation</h4>
Documentation site: <a href="https://docs.poweredcache.com/" rel="nofollow ugc">https://docs.poweredcache.com/</a>
Developer Docs: <a href="https://poweredcache.github.io/docs/" rel="nofollow ugc">https://poweredcache.github.io/docs/</a> (Hook reference)

Powered Cache – Caching and Optimization for WordPress – Easily Improve PageSpeed & Web Vitals Score

I think Powered Cache is the best option if you need a caching plugin that distinguishes between desktop and mobile. At least, I love it for that.

And I love it also because it writes in the .htaccess file, so, when the page is served by the cache, no lines of PHP code runs.

You can't ask more. I wish you all the best in growing this amazing plugin.

The best free caching plugin that gives you separate cache for mobile

A very nice caching plugin that encompasses both page and object cache. 

Has some advanced functionality out of the box like cache preloading and support for cookie Vary (not just cookie bypass like most plugins).

Author is responsive and active!


Great plugin

Powered Cache is one of the best cache plugins, IMO. It has all of the key features every cache plugins should have and great extra features such as object cache drop-in, varnish extension, WP-CLI commands.

I also think it has well written, secure and developer friendly code base.

One of the best!

Easy to setup and very powerful cache plugin.
Settings tabs are grouped accurately and you can find what you need in a few seconds.
Works great with Redis.

Free version has all enough features to get started with. (the most important features are in the free version - which should be appreciated, IMHO)

Idea & Wish: 
- would be great if to add disk-based object caching in the future. (for those who don't have Redis/Memcached)
- wish you will keep simplicity/liteweight approach. 
more features != better product. 
- wish you to continue supporting and improving the plugin so that it will become one of the most popular cache plugins in 1-2 years.

Simple and powerful


Powered Cache is the only cache plugin that gives excellent results on every site. Amazing job, thanks! 


Best cache plugin ever!


I've tried so many paid and free WordPress plugins to speed up my sites in the past, but I've ended in Powered Cache since it's too good!



Ability to utilize static cache generation, object cache, minification and all the other options make this plugin a one stop no-brainer solution, which was what I was looking for.



Give it a try!


The best Multi-functional Caching tool ever

Powered Cache is the most powerful caching and performance suite for WordPress. Easily Improve PageSpeed & Web Vitals Score.

Featured Image Sharpen Up vs Powered Cache – Caching and Optimization for WordPress – Easily Improve PageSpeed & Web Vitals Score